EP 2851553 B1 20180214 - Arrangement to reduce noise of a wind turbine rotor blade
Title (en)
Arrangement to reduce noise of a wind turbine rotor blade
Title (de)
Anordnung zur Minderung des Geräusches eines Windturbinenrotorblatts
Title (fr)
Agencement permettant de réduire le bruit d'une pale de rotor de turbine éolienne
Publication
Application
Priority
EP 13184966 A 20130918
Abstract (en)
[origin: EP2851553A1] The invention relates to an arrangement (10) to reduce noise of a wind turbine rotor blade (20), wherein the arrangement (10) comprises a wind turbine rotor blade (20) and a noise reduction means. The noise reduction means comprises a serrated extension (41) for at least reducing noise which is generated from the wind turbine rotor blade (20), and the noise reduction means is attached to the trailing edge section (27). The serrated extension (41) comprises a number of first teeth (61) and a number of second teeth (62). The design of the first teeth (61) and the design of the second teeth (62) are differently compared to each other such that suction side noise, which is generated at a suction side (34) of the wind turbine rotor blade (20), and pressure side noise, which is generated at a pressure side (33) of the wind turbine rotor blade (20), are both reduced by the teeth (61, 62) of the serrated extension (41). Advantageously, the first teeth (61) and the second teeth (62) are arranged in an alternating, periodic pattern and differ from each other by an angle of inclination (43) with regard to a trailing edge streamline (42) and or by its planform shape. Furthermore, the invention relates to a method to reduce noise of a wind turbine rotor blade (20).
IPC 8 full level
F03D 1/06 (2006.01)
CPC (source: CN EP US)
F03D 1/0608 (2013.01 - CN EP US); F03D 1/0641 (2013.01 - US); F03D 1/0675 (2013.01 - US); F05B 2240/30 (2013.01 - CN EP US); F05B 2260/96 (2013.01 - CN EP US); Y02E 10/72 (2013.01 - EP US); Y10T 29/49318 (2015.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2851553 A1 20150325; EP 2851553 B1 20180214; CN 104454379 A 20150325; CN 104454379 B 20220114; DK 2851553 T3 20180312; ES 2663672 T3 20180416; US 2015078910 A1 20150319; US 9719488 B2 20170801
DOCDB simple family (application)
EP 13184966 A 20130918; CN 201410477011 A 20140918; DK 13184966 T 20130918; ES 13184966 T 20130918; US 201414455971 A 20140811